Fur baby problems

Al
I'm not entirely sure where to post this, but I figure someone should have at least a bit of advice. Ever since we came home from the hospital, my normally well behaved dog has turned into a complete asshat. I don't know what to do! He's jealous and vengeful. For example, today he got in trouble for attempting to eat Reese's pacifier right out of my hand. So he waited until I got Reese settled in to breastfeed and went into my bathroom and knocked over the trash can. Or like last night, he got mad because he's not allowed to sleep in my bed anymore (he hasn't for a few months because I was trying to avoid this) so he peed in the floor right outside my bedroom door. I can't deal with this. I'm about to lose my mind. He's completely house trained and before this he was just fine. Does anyone have any advice on what to do about this?